Valve



No. 749,637. PATENTED JAN. 12, 1904.

F. L. SMITH.

VALVE.

APPLICATION FILED 113.24, 1903. NO 1101231..

V v J UNITED STATES Patented January 12, 1904.

PATENT OFFICE.

FRANK L. SMITH, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT'AND VALVE. t

RIOKSEOKER SPECIFICATION forming part of Letters Patent No. 749,637, dated January 12, 1904.

Application'filed February 24, 1903. Serial No. 144,629. (No mbdel.) I i T on whom it may concern:

Be it known that I, FRANK L. SMITH, a citizen of the United States, residing at No. 5733 Union avenue, Chicago, in' the county of Cook and State of Illinois, have invented new and useful Improvements in Valves, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an improved form of construction of valves,

particularly such as are made detachable from their operating-stems, and connected with their stems in such manner that the rotation of the latter for forcing the valve to its seat does not rotate the valve, and in this particular form it is designed to afford more secure means of detachably connecting the valve and stem.

It consists in the features of construction which are set out in the claims.

In the drawings, Figure 1 isa side elevation of my improved valve in its preferred form.

Fig. 2 is a transverse section at the line 2 2 on Fig. 1, Fig. 3 is an axial section at the line 3 3 on Fig. 2. Fig. 4: is an axial section of the valve proper without the stem in a slightly modified form. Fig. 5, is a face'view of the valve seen in Figs. 1 and 3. I

In the drawings I have shown a customary form of valve-stem 1, having the thread 2 for engagement with the valve-body to screw the valve down to its seat. This stem is adapted to be detachably engaged with the valve-head 3, the latter having a hub or boss 4 atthe back, which is provided with'a cavity 5, leading in from one side, overhung by an inner marginal flange 6, and adapted to admit the flange-tel minal 7 of the valve-stem 1, which being introduced is accommodated in the cavity at a it. I overcome this defectby cutting back the under side of the flange 6, forming a rabbet 9, which accommodates the flange-terminal 7,. said rabbet being not extended laterally to the edge of the flange at the side at which the openingis formed through which the terminal flange of the valve-stem enters, but being limited to a circular form, so that when the valve-stem has been entered by the engagement of its flange-terminal under the flange 6 a short longitudinal movement engages the flange-terminal 7 in the rabbet 9 in such manner that lateral displacement. is prevented. To prevent disengagement of the parts when thus engaged,I provide r'key-plate 10,adapted to be inserted between the end of the valvestemand the bottom of the cavity in the boss 4. This key-plate has a tongue 11, which protrudesthrough an aperture 12, cut through the boss opposite the lateral opening through whiclrthe valve-terminal enters, and the keypla'te being made of suitable flexible material,

preferably copper, the tongue 11] may be slightly bent up outside thebo'ssafter the key: plate is inserted, and thus held safely in place.

The 'l' ey= plate can be removed readily by detach the valve-head from the stem. I

The seating-face'of my improved valve is formed ofa metal disk 13, which designed to be used instead of the rubber orasbestos rings which are customarily employed for such purposes and eitherdetachably clamped to the valve or molded therein, according to the material. made of metah suc h as copper, which will not tend materially'to cut away the seat on which they are forced. I prefer to make the valve head withan annular chamber 14, in which straightening the tongue when it is desired to .there may be lodged a plurality of annular copper disks concavo-convex in radial section and adapted to be nested, as seen in the axial sectional views, a sufiicient number being thus 7 lodged'in thechamber to fill it and cause the outer one to protrude sufficiently to form an exteriorly-contex seating-surface. To retain the disks, whether nested as described or employed singly, in a cavity of correspondingly The disks 13 are preferably less depth, I slightly undercut the sides of the annular cavity, leaving minute marginal flanges 15 15 at the edges. I make the annular disks 13 of such inner and outer diameters that they may be forced into the annular cavity by slight pressure past these minute flanges somewhat as a watch-crystal is forced in the bezel, the outermost of the disks being thus engaged somewhat snugly under the flanges, the engagement being suflicient to retain them in place while the valve is introduced to its seat and screwed down. valves firmlywill expand the outer disk 13, so as to force both its edges out under the flanges 15 15 to an extent to make the engagement very secure. The disks being all formed with the same die and with the same convexity, when nested as described they will come together at their circumferential margins, leaving a slight crescent-shaped cavity between them, as seen at 17 in the drawings, thus permitting the slight flattening of the outermost disk which results from forcing the valve to its seat, expanding the disk so as to effect secure engagement at its circumference under the flanges 15 15, as described. At the same time the arch form will give an adequate degree of stifiness and some elastic reaction suflicient to insure perfect seating even upon a slightly-uneven seat. To further increase this elastic resiliency and prevent the entire nest of disks from being flattened during the use of the first one, I prefer to employ a steel disk 19 at the back or bottom of the pile, which will uphold the softer copper disks. This steel disk may, preferably, be formed slightly more convex than the copper disks, so as to fully seat within them at the middle of the width of the ring. When the outermost disk has become worn, so as to require a change, it may be removed by introducing any suitable tool under one margin at any point and stripping the outermost disk out from under the flanges 15. The other disks not having been expanded materially will be readily removed in the same way, and the disk which has been outermost being placed at the back of the pile a fresh disk is brought to the front and secured in the original manner under the flanges 15. The user is thus able to repair the valve quickly and completely as many times as there are disks in the nest or pile without expense, and at any time, even when only a single disk is used, the repair is easy and cheaply made,

involving only the cost of a new disk. A.

slight recess 18 in one margin facilitates engaging the disks for removal.

In some forms of the valves it maybe found preferable to secure the disks 13 by a removable element instead of by relying upon the expansion of the disks under the flanges 15, as described. In Fig. 4 I have shown a modification in this respect, consisting in forming at the center of the valve-body a threaded boss 21, which receives a clamping-plate 22,

Once seating the.

screwed onto the boss and pressing upon the inner marginal portion of the disks, binding them together in the cavity of the valve-head. In this form the bottom plate 23, of steel, is preferably made with only a central aperture suflicient to admit it onto the threaded boss, thus giving it a central flat portion 24 within the annular concavo-convex portion which supports the rings.

I claim 1. Avalve comprising a chambered seatingface and a removable annular concavo-convex soft-metal disk lodged in the face-chamber with convex surface outward.

2. A valve comprising a head having a charmbered seating-face and a plurality of annular concavo-convex soft-metal disks nested and lodged in the face-chamber with convex face outward to form the seating-surface of the valve.

3. Avalve comprising a head having its face provided with an annular chamber and an annular concavo-convex soft-metal ring lodged in said chamber with its convex face outward,

each circumferential margin of said chamber being slightly undercut to form a bezel, and said annular disk being engaged at its inner and outer circumferences respectively with said undercut margins, whereby the expansion of the annular disk by the pressure of the valve on its seat increases the engagement of the disk with such bezel.

4. A valve comprising a head having a chambered face; a hard spring-metal disk lodged in such chamber comprising a concavo-convex annulus with convex face outward, and a pile I of soft-metal annular concavo-convex disks lodged and secured in the chamber resting on said hard-metal disk. I

5. A valve comprising a head having an annularly-chambered face; a pile of annular concavo-convex soft-metal disks nested and lodged in such annular chamber, the convex side outward, the circumferential Walls of said annular chamber having at their outer edge minute inwardly-projecting flanges, the outermost of the disks being engaged behind the flanges.

6. A valve comprising a head having a chambered face; a hard spring-metal disk lodged in such chamber comprising a concavo-convex annulus with convex face outward, and a pile of soft-metal annular concavo-convex disks lodged and secured in the chamber resting on said hard metal disk, the steel disk being slightly more convex than the soft-metal disks, to adapt it to support them at the middle.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chicago, Illinois, this 14th day of February,

FRANK L. SMITH. In presence of OHAs. S. BURTON, FRED. G. FIsonER 

